Tests: sensible precision expectation for single arithmetics

src/Numerics/Precision.cs

@@ -1254,7 +1254,7 @@ namespace MathNet.Numerics
                 return a == b;
             }
 
-            if (Math.Abs(a) < _doubleMachinePrecision || Math.Abs(b) < _doubleMachinePrecision)
+            if (Math.Abs(a) < _singleMachinePrecision || Math.Abs(b) < _singleMachinePrecision)
             {
                 return AlmostEqualWithAbsoluteDecimalPlaces(a, b, decimalPlaces);
             }

src/UnitTests/LinearAlgebraTests/Complex32/MatrixTests.Arithmetic.cs

@@ -593,7 +593,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Complex32
             {
                 for (var j = 0; j < matrixC.ColumnCount; j++)
                 {
-                    AssertHelpers.AlmostEqual(matrixA.Row(i) * matrixB.Row(j), matrixC[i, j], 15);
+                    AssertHelpers.AlmostEqual(matrixA.Row(i) * matrixB.Row(j), matrixC[i, j], 7);
                 }
             }
         }
@@ -815,7 +815,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Complex32
             {
                 for (var j = 0; j < matrixC.ColumnCount; j++)
                 {
-                    AssertHelpers.AlmostEqual(matrixA.Column(i) * matrixB.Column(j), matrixC[i, j], 15);
+                    AssertHelpers.AlmostEqual(matrixA.Column(i) * matrixB.Column(j), matrixC[i, j], 7);
                 }
             }
         }
@@ -864,7 +864,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Complex32
             {
                 for (var j = 0; j < matrixC.ColumnCount; j++)
                 {
-                    AssertHelpers.AlmostEqual(matrixA.Column(i) * matrixB.Column(j), matrixC[i, j], 15);
+                    AssertHelpers.AlmostEqual(matrixA.Column(i) * matrixB.Column(j), matrixC[i, j], 7);
                 }
             }
         }

src/UnitTests/LinearAlgebraTests/Single/MatrixTests.Arithmetic.cs

@@ -588,7 +588,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Single
             {
                 for (var j = 0; j < matrixC.ColumnCount; j++)
                 {
-                    AssertHelpers.AlmostEqual(matrixA.Row(i) * matrixB.Row(j), matrixC[i, j], 15);
+                    AssertHelpers.AlmostEqual(matrixA.Row(i) * matrixB.Row(j), matrixC[i, j], 7);
                 }
             }
         }
@@ -810,7 +810,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Single
             {
                 for (var j = 0; j < matrixC.ColumnCount; j++)
                 {
-                    AssertHelpers.AlmostEqual(matrixA.Column(i) * matrixB.Column(j), matrixC[i, j], 15);
+                    AssertHelpers.AlmostEqual(matrixA.Column(i) * matrixB.Column(j), matrixC[i, j], 7);
                 }
             }
         }
@@ -859,7 +859,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Single
             {
                 for (var j = 0; j < matrixC.ColumnCount; j++)
                 {
-                    AssertHelpers.AlmostEqual(matrixA.Column(i) * matrixB.Column(j), matrixC[i, j], 15);
+                    AssertHelpers.AlmostEqual(matrixA.Column(i) * matrixB.Column(j), matrixC[i, j], 7);
                 }
             }
         }